Suruga, Satta no Kaijō (The sea off Satta, Suruga), woodblock print by Hiroshige.

Suruga Bay (駿河湾, Suruga-wan) is a bay on the Pacific coast of Honshū in Shizuoka Prefecture, Japan. It is situated north of an imaginary line joining Omaezaki Point and Irōzaki Point at the tip of the Izu Peninsula and surrounded by Honshū to the southwest and west and the Izu Peninsula to the east.

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Suruga Bay is a place of contrasts. Japan's loftiest peak, Mount Fuji at 3,776 m (12,388 ft), rises from the 2,500-m depth of the Suruga Trough running up the middle of the bay, which makes it Japan's deepest. Numerous rivers—especially the major Fuji, the Ōi, and Abe Rivers—empty into its western portion, giving that area of the bay a seabed rich in submarine canyons and other geographical features, whereas at the bay's easternmost end, only the Kano River empties into a pocket (called Uchiura-wan) at Numazu where the Izu Peninsula connects to Honshū, giving the water greater transparency and leaving the seabed largely flat except for a number of small rocky islands, some joined to the mainland by tombolos. This seabed variety coincides with coastline differences as well: The western and central sections of the Suruga Bay coastline, roughly from Shizuoka to Numazu, are characterized by sandy beaches such as those at Yuigahama and Tagonoura, whereas the eastern and northeastern stretches from Numazu down the southwestern coast of the Izu Peninsula to Irōzaki, are generally rocky.

The bay is open to the Philippine Sea/Pacific Ocean to the south, but is mostly protected from oceanic waves by Izu Peninsula. This, coupled with the seabed and water characteristics mentioned above, results in conditions favorable to fishing, sailing, windsurfing, swimming and research on deep-sea organisms.[1] An undersea plateau at the bay's southwest end, known as Senoumi, is especially well known as a rich fishing ground.

In addition to the sources cited in the text, this article draws on the content of the corresponding article in the Japanese Wikipedia, as well as Japanese articles corresponding to other English Wikipedia articles linked to in the text.